7-Acyl-7-arylthiocephalosporins

ABSTRACT

Disclosed herein are cephalosporanic acid and novel derivatives thereof which are substituted in the 7-position, processes for preparing such compounds and the utility thereof. The compounds of the invention have been found to be useful as antibacterial agents.

This application is a division of Ser. No. 480,789 filed on June 19,1974, now U.S. Pat. No. 3,954,744, which was a division of Ser. No.260,620 filed on June 7, 1972, now U.S. Pat. No. 3,840,533, which was acontinuation-in-part of application Ser. No. 174,510 filed on Aug. 24,1971, now abandoned.

SUMMARY OF THE INVENTION

This invention relates to 7-substituted-7-amino-cephalosporanic acidhaving the following Formula I: ##STR1## wherein R³ is alkylsulfonyl,arylsulfonyl, aralkylsulfonyl, cyano, halogen, aralkoxy, acyl, arylthio,alkylthio, and alkyl having electronegative substituents therein such ashalogen, cyano, perfluoro lower alkyl, substituted carbalkoxy,dialkylaminoalkyl, alkoxy, acyloxy, and R⁴ is hydrogen, lower alkyl,aralkyl, substituted alkyl, substituted aralkyl or cation; Y ishydrogen, acetoxy, pyridinium, alkoxy, alkyl, mercapto, hydroxy oralkylamino. These compounds have been found to be useful asantibacterial agents and as intermediates in the preparation of7-acylamino-7-substituted cephalosporanic acids and pharmaceuticallyacceptable salts thereof.

DESCRIPTION OF INVENTION

This invention relates to novel 7-substituted-7-aminocephalosporanicacid and derivatives thereof which are active as antibacterial agentsand are valuable intermediates utilized in the preparation of theacylated derivatives. The 7-substituted-7-aminocephalosporanic acids andsalts of this invention also possess antibacterial activity which isenhanced by acylation of the 7-amino group. In Formulae I and V the termpharmaceutically acceptable cation means an alkali metal (e.g., sodiumand potassium), an alkaline earth metal (e.g., calcium and magnesium),ammonium, or an amine, such as a lower alkyl amine (e.g., methylamine),a di(lower alkyl)amine (e.g., diethylamine), a phenyl-lower alkylamine(e.g., benzylamine), a di(phenyl-lower alkyl)amine (e.g.,dibenzylamine), or an alkylenediamine (e.g.,N,N'-dibenzylethylenediamine), or the like. In the case where Y=pyridinium or quarternary ammonium, R⁴ is represented by an anion.

Compounds of Formula I are prepared by reacting a Schiff's base of7-aminocephalosporanic acid of Formula II: ##STR2## wherein R⁹ isphenyl, X-substituted phenyl, lower alkyl or aralkyl (e.g., benzyl orphenethyl), wherein X is halogen (e.g., chloro, bromo), alkoxy, hydroxy,nitro, amine, or lower alkyl; with an electrophilic agent having theFormula III:

    r.sup.3 -- l                                               iii

wherein L is a leaving group such as halogen (e.g., chloro-bromo-, andso forth), sulfonate, sulfate, methylsulfonyloxy, p-toluenesulfonyloxy,quaternary amine, etc., and R³ and Y are as defined herein.

This reaction is conducted in the presence of a base, such as alkalimetal hydroxide such as sodium hydroxide, potassium t-butoxide or sodiummethoxide, or other types such as sodium hydride or triphenyl methylsodium.

Compounds of Formula III that may be utilized in the practice of theinvention are perchloryl fluoride, trifluoromethyl bromide, cyanogenchloride, acetyl chloride, benzoyl chloride, ethyl bromo acetate, ethylchloroformate, phenylsulfenyl chloride, pentafluoroethyl iodide,chlorine, bromine, methyl sulfenyl chloride, methyl thiomesylate, etc.Suitable organic solvents include benzene, dimethoxyethane, dimethylsulfoxide, dioxane, dimethyl formamide, etc.

It is to be understood that the term lower alkyl and lower alkoxy in theformulae of the instant invention include straight and branched chainradicals of from 1 to about 8 carbons such as methyl, ethyl, propyl,isopropyl, butyl, isobutyl, t-butyl, amyl, methoxy, ethoxy, propoxy,isopropoxy, and the like. Further, it will be appreciated that certainof the compounds of this invention exist in different optically activeforms. The various stereoisomeric forms as well as the racemic compoundsare within the scope of this invention. The preferred form is that inwhich 6-amino group (or substituted 6-amino group) is cis to the sulfuratom, thereby resembling the natural cephalosporins.

The term aryl, such as in aryl, aryloxy, arylthio, etc. is intended toinclude phenyl, α- and β-naphthyl. In addition, the term aryl isintended to encompass mono and disubstituted-phenyl, or α- andβ-naphthyl groups wherein said substituents are halogen, hydroxy, amino,nitro and alkyl.

The term "heterocyclyl", while intended to encompass the entire class,more specifically is intended to encompass the thiophene, isoxazole,oxadiazole, thiadiazole, pyridine, pyrazene, morpholine, quinoline,isoquinoline, tetrazole, furan, pyrrole and indole. The ring systems maybe at various hydrogenated states, such as dihydrofuran andtetrahydrofuran. In addition, the point of linkage may be at any of thepossible ring positions and the ring systems may carry additionalsubstituents such as alkyl, alkoxy, amino, nitro, halogen, etc.

Suitable compounds of Formula II include any Schiff's base of 7-ADCA or7-ACA (or a protected form thereof). When using this process, thepreferred Schiff's bases are those formed with aldehydes which do notinterfere with the substitution reaction. Thus, although any of theSchiff's bases of 6-APA disclosed in Patent Application No. 84,946 canbe used correspondingly with 7-ACA or 7-ADCA nuclei, the preferred arethose of the formula: RCHO, wherein R is phenyl, p-methoxyphenyl,m-nitrophenyl, halophenyl (e.g., p-chlorophenyl, m-fluorophenyl, ando-bromophenyl), (lower alkoxyl)phenol (e.g., o-methoxyphenyl),carbo(lower alkoxy)phenyl (e.g., p-carbomethoxyphenyl,o-carboethoxyphenyl, p-carbohexyloxyphenyl, and m-carbobutoxyphenyl),o-n-propoxyphenyl, and p-n-hexyloxyphenyl), di(lower alkyl) aminophenyl[e.g., p-dimethylaminophenyl, o-diethylaminophenyl,p-(N-n-butyl-N-methylamine)-phenyl, and m-di-n-pentyl-aminophenyl],naphthyl. The reaction in forming compounds of Formula II is preferablyconducted in an inert organic solvent for the Schiff's base reactant,such as methylene chloride, benzene, dimethoxyethane, dioxane andchloroform.

Compounds of the Formula II are used preferably in the form of an ester.Suitable esters include those formed with lower alkanols (e.g.,methanol, ethanol and tert.-butanol), cycloalkanols (e.g., cyclohexanoland cyclopentanol), carbocyclic aryl aryl alcohols (e.g., benzylalcohol, benzhydrol, 1-naphthylmethyl alcohol and 2-phenylethanol),trimethylsilyl, lower alkanoyl (lower alkanols) (e.g., hydroxyacetoneand pivaloylmethanol), carbocyclic aroyl (lower alkanols) (e.g.,benzoylmethanol, 2-benzoylethanol and 2-naphthylcarbonylmethanol),cycloalkylcarbonyl (lower alkanols) (e.g.,hydroxymethylcyclohexylketone), lower alkanoyloxy (lower alkanols)(e.g., pivaloyloxymethanol), and substituted derivatives of any of theabove, such as lower alkyl (e.g., methyl and ethyl), lower alkoxy (e.g.,methoxy and butoxy), halo (e.g., chloro, fluoro and bromo), and nitroderivatives, as exemplified by 2,2,2-trichloroethanol, 2-bromoethanol,p-nitrophenol, p-methoxyphenol, p-methoxybenzyl alcohol,p,p'-dimethoxybenzhydrol, 2-dimethylamino ethanol,p-nitrobenzoylmethanol and p-methoxybenzoylmethanol.

The reaction of Compound II with Compound III yields a compound ofFormula IV: ##STR3## which can then be converted to compounds of FormulaI by hydrolysis in the presence of a mild aqueous acid, such ashydrochloric, sulfuric, formic, trifluoroacetic, acetic andp-toluenesulfonic acid to yield the 7-substituted 7-aminocephalosporanicacid of Formula I.

In the event a 7-aryloxy compound is desired, an intermediate wherein R³= halogen such as fluorine, chlorine, or bromine is prepared, followedby mild solvolysis with phenol to produce IV, R³ = RO--; there may thenbe hydrolyzed to corresponding compounds of Formula I. Similarly7-alkoxy compounds can be made. In a similar manner, RZ may beintroduced wherein R is lower alkyl, aryl or acyl and Z is oxygen,nitrogen or sulfur.

As stated above compounds of Formula I are valuable intermediates in theformation of acylated compounds having the Formula V: ##STR4## whereinY, R³ and R⁴ are as defined herein and R is acyl. Acyl in this inventionis defined as:

(a) R² (CH₂)_(n) CO-- where R² is phenyl, nitrophenyl, chlorophenyl,bromophenyl, lower alkyl phenyl, lower alkoxy phenyl, cycloalkyl orheterocyclyl, and n is an integer from 0, 1 to 4,

(b) R⁵ CO-- where R⁵ contains from 2 to 7 carbon atoms and is alkyl,alkylthioalkyl or alkoxyalkoxyalkyl,

(c) R⁶ CO-- where R⁶ contains from 2 to 7 carbon atoms and is alkenyl,alkylthioalkenyl, alkenylthioalkyl, alkoxyalkenyl or alkenyloxyalkyl,

(d) R² X₁ (CH₂)_(n) CO-- where R² and n are as defined above and X₁ isoxygen or sulphur.

(e) R² (CH₂)_(n) S(CH₂)_(m) CH₂ CO-- where R² and n are as defined aboveand m is 0 or an integer from 1 to 4,

(f) R² CO-- where R² is as defined above,

(g) R⁷ (CH₂)_(n) CO-- where R⁷ is carbocyclic or substituted carbocyclic(e.g., lower alkyl dihydrocyclohexyl, lower alkoxy dihydrocyclohexylsuch as 2,4-dimethyl-2,4-dihydrocyclohexyl, and2-propoxy-2,4-dihydrocyclohexyl), aryl, heterocyclyl, aryloxy, arylthioand alkyloxy, and n is an integer from 0, 1 to 4,

(h) ##STR5## where R⁷ is as defined herein, R⁸ is alkyl, amino, ureido,carboxy, sulfonyl, phosphonyl, hydrogen, hydroxy, chloro, bromo, oriodo, p is an integer from 0, 1 to 3, and

(i) ##STR6## where R², R⁸ and p are as defined above.

Compounds of general Formula V are prepared from compounds of generalFormula I.

The formation of compounds of general Formula V may, for example, beeffected by one of the following methods:

(a) Reaction of the compound of general Formula I with an acid chloride,or acid anhydride, active ester, acid azide, etc. in aqueous or organicsolution.

(b) Reaction of the compound of general Formula I with a mixed anhydrideof an acid corresponding to the desired acyl group and another acid, themixed anhydride being formed by reaction of the acid corresponding tothe desired acyl group with an alkyl haloformate, if desired formed insitu; the reaction with the mixed anhydride preferably being conductedin solution in an anhydrous, inert solvent in the presence of an acidbinding agent e.g., a tertiary amine.

(c) Reaction of the compound of Formula I with the activated form of acarboxylic acid formed by reaction with carbonyl-di-imidazole ordicyclohexylcarbodiimide or similar activating agent.

Alternatively, compounds of Formula IV may be acylated directly by theprocedures of U.S. Patent Application 71,226, filed September 10, 1970,to yield compounds of Formula V directly where R⁴ is hydrogen theprocedure can be carried out by known methods.

The compounds of this invention have a broad spectrum of antibioticactivity. They have antibacterial activity against both gram-positiveand gram-negative organisms, such as Staphylococcus aureus, Salmonellaschottmuelleri, Proteus vulgaris, Escherichia coli and Streptococcuspyrogenes. They may be used as antibacterial agents in a prophylacticmanner, e.g., in cleaning or disinfecting compositions, or otherwise tocombat infections due to organisms such as those named above, and ingeneral may be utilized in a manner similar to cephalothin, cephalexin,cephaloridine and other cephalosporins. For example, a compound ofFormula I may be used in various animal species in an amount of about0.1 to 100 mg/kg daily, orally or parenterally, in single or two to fourdivided doses to treat infections of bacterial origin. Up to about 600mg. of a compound of Formula I or V may be incorporated in an oraldosage form such as tablets, capsules, or elixirs or an injectable formin a sterile aqueous vehicle prepared according to conventionalpharmaceutical factors. In cleaning or disinfecting compositions, e.g.,in farm or diary equipment, a concentration of about 0.01 to 1% byweight of such compounds admixed with, suspended or dissolved inconventional inert dry or aqueous carriers by application by washing orspraying may be utilized.

The following examples illustrate the invention (all temperatures beingin degrees Centigrade, unless otherwise stated):

EXAMPLE 1 N-Benzylidene-7-Aminodesacetoxycephalosporanic acid,t-octylamine salt

25 g 7-aminodesacetoxycephalosporanic acid is slurried in 2.5 literswater and neutralized over a period of 1- 11/2 hours to pH 7.5 withoctylamine.The solution clarified and 12.1 ml. benzaldehyde is addedover a period of 1/2 hour. After two hours agitation at roomtemperature, the solids are filtered and washed with 100 ml. water. Theproduct is dried at 40°C. overnight to give 43 grams of the desiredproduct.

EXAMPLES 2-5

By following the procedure of Example 1 and substituting in place of thebenzaldehyde an equivalent amount of:

o-nitrobenzaldehyde,

m-chlorobenzaldehyde,

p-methoxybenzaldehyde, and

p-methylbenzaldehyde,

the products obtained are:

N-o-nitrobenzylidene-7-aminodesacetoxycephalosporanic acid,

t-octylamine salt;

N-m-chlorobenzylidene-7-aminodesacetoxycephalosporanic acid,t-octylamine salt;

N-p-methoxybenzylidene-7-aminodesacetoxycephalosporanic acid,t-octylamine salt; and

N-p-methylbenzylidene-7-aminodesacetoxycephalosporanic acid,t-octylamine salt.

EXAMPLE 6 N-Benzylidene-7-Aminodesacetoxycephalosporanic Acid

73.8 Mmoles N-benzylidene-7-aminodesacetoxycephalosporanic acid,t-octylamine salt is added to 240 ml. methylene chloride cooled to 0°-5°C. (water bath). After dispersion 158.5 mmoles benzaldehyde are added,followed by the addition of an 8 ml. tetrahydrofuran solution containing76.2 mmoles trifluoroacetic acid. During the course of this addition,the reaction mixture gradually clarifies to finally form a clear,slightly yellow solution. The reaction mixture is allowed to reach roomtemperature and concentrated to one-thirdits volume in vacuo at atemperature not exceeding 30° C. On coolingthe desired productcrystallized out in 76 mole %.

EXAMPLE 7 Benzyl ester of N-benzylidene-7-aminodesacetoxycephalosporanicacid

Treatment of a 0.1 molar solution ofN-benzylidene-7-aminodesacetoxycephalosporanic acid with one equivalentofphenyl diazomethane in ether (Overberger and Anselme, J. ORG. CHEM.,28, 592 [1963]; Idem, J. AM. CHEM. SOC., 86, 658 [1964] for one hour,followedby evaporation deposits the product.

EXAMPLE 8 Diphenylmethyl ester ofN-benzylidene-7-aminodesacetoxycephalosporanic acid

Substitution of one equivalent of diphenyldiazomethane for the solutionof phenyl diazomethane in Example 7 gives the desired product.

EXAMPLE 9 Trichloroethyl ester of 7-benzaliminodesacetoxycephalosporanicacid

The Schiff base of Example 1 (10.0 g) is dissolved in 150 ml. ofdichloromethane containing pyridine (5.2 g). Trichloroethanol 9.84 g isadded followed by 6.79 g dicyclohexylcarbodiimide and the mixturestirred for two hours at room temperature. Precipitation ofdicyclohexylurea occurs quickly. After two hours the precipitate isfiltered off. The filtrate is diluted with dichloromethane and washedtwice with an equal volume of water, first at pH 3.5, then at pH 7.2. Itis then washed with saturated sodium chloride, dried over anhydrousmagnesium sulfate, and stripped to dryness in vacuo. Wt. of yellow oil =13.2 g.

The product is crystallized by dissolving it in 5 ml. of ether andadding hexane to the warm solution until slightly turbid upon cooling.

EXAMPLE 10 p-Methoxybenzyl ester of7-benzaliminodesacetoxycephalosporanic acid

Substitution of 9.1 grams of p-methoxybenzyl alcohol fortrichloroethanol in Example 9 leads to the desired product.

EXAMPLE 11 Methyl ester of 7-benzaliminodesacetoxycephalosporanic acid

By treating a dioxane solution of the product of Example 2 with excessethereal diazomethane, followed by evaporation of the solvent, thedesiredproduct is obtained. Trituration with hexane gives a powder.

EXAMPLE 12 7-Benzalimino-7-cyanodesacetoxycephalosporanic acid methylester

12.5 Meq. 7-benzaliminodesacetoxycephalosporanic acid methyl ester aredissolved in 2 ml. dry DME under nitrogen at -5° C. along with 12.5meq.potassium t-butoxide. The reaction mixture turns yellow after a fewminutes of stirring at that low temperature. 12.5 meq. ofcyanogenchlorideis added. After 1/2 hour the reaction mixture is dilutedwith chloroform, washed with water, dried over magnesium sulphate andevaporated in vacuo to give the product.

EXAMPLE 13 7-Benzalimino-7-cyanodesacetoxycephalosporanic acid,p-methoxybenzyl ester

Substitution of 12.5 meq. of the p-methoxybenzyl ester of7-benzaliminodesacetoxycephalosporanic acid in Example 12 for the methylester leads to the desired product.

EXAMPLE 14 7-Cyano-7-aminodesacetoxycephalosporanic acid

0.2 Mmole N-benzylidene-7-amino-7-cyano-desacetoxycephalosporanic acid,p-methoxybenzyl ester are dissolved in 6.5 ml. benzene and 4.33 mmolesanisole and 7.6 mmoles TFA are added. The reaction is allowed to proceedat room temperature for 6 hours. The whole is concentrated under vacuum.The residue is washed with 20% ether/petroleum ether to leave7-cyano-7-aminodesacetoxycephalosporanic acid.

EXAMPLE 15 7-Benzalimino-7-cyanodesacetoxycephalosporanic acid, benzylester

Substitution of 12.5 meq. of the benzyl ester of7-benzaliminodesacetoxycephalosporanic acid in Example 12 for the methylester leads to the desired product.

EXAMPLE 16 7-Benzalimino-7-cyanodesacetoxycephalosporanic acid,benzhydryl ester

By substituting 12.5 meq. of the benzhydryl ester for the methyl esterof Example 12, the desired product is obtained.

EXAMPLE 17 7-Amino-7-cyanodesacetoxycephalosporanic acid, methyl ester

6.2 Meq. 7-benzalimino-7-cyanodesacetoxycephalosporanic acid, methylester are hydrolyzed in a 50:50 mixture of acetone and 0.1 N aqueoushydrochloric acid for 10 minutes. The reaction mixture is then dilutedwith water and washed with chloroform. The acidic layer is then basifiedand extracted with chloroform. This latter chloroform layer is driedover magnesium sulphate and evaporated to dryness in vacuo. To give 5meq. 7-amino-7-cyano desacetoxycephalosporanic acid, methyl ester.

EXAMPLE 18 7-Amino-7-cyanodesacetoxycephalosporanic acid,p-methoxybenzyl ester

Substituting 6.2 meq. of the product of Example 13 and following theprocedure of Example 17, the desired product is obtained.

EXAMPLE 19 7-Amino-7-cyanodesacetoxycephalosporanic acid, benzyl ester

Substituting 6.2 meq. of the product of Example 15 for the substrate ofExample 17, and following the procedure therein, the desired product isobtained.

EXAMPLE 20 7-Amino-7-cyanodesacetoxycephalosporanic acid, benzhydrylester

Substituting 6.2 meq. of the product of Example 16 for the substrate ofExample 17, and following the procedure therein, the desired product isobtained.

EXAMPLE 21 7-Phenylacetamido-7-cyanodesacetoxycephalosporanic acid,methyl ester

3.25 Meq. 7-amino-7-cyanodesacetoxycephalosporanic acid, methyl esterare dissolved in 30 ml. chloroform, and cooled to ice-bath temperatureunder nitrogen. Then 3.25 meq. triethylamine are added followed by theaddition of 3.25 meq. phenylacetylchloride. The reaction is allowed toproceed for two hours at ice-bath temperatures and under nitrogen. Thesolution is diluted with chloroform, washed with an aqueous solution atpH 7.2, washedwith water, dried over magnesium sulphate, and evaporatedto dryness to give 1.7 meq. of7-phenylacetamido-7-cyanodesacetoxycephalosporanic acid, methyl ester asa clear oil.

EXAMPLE 22 7-Phenylacetamido-7-cyanodesacetoxycephalosporanic acid,p-methoxybenzyl ester

(a) Substituting 3.25 meq. of 7-amino-7-cyanodesacetoxycephalosporanicacid, p-methoxybenzyl ester in Example 21 for7-amino-7-cyanodesacetoxycephalosporanic acid, methyl ester, andfollowingthe procedure therein, the desired product was obtained.

(b) 7-Phenylacetamido-7-cyanodesacetoxycephalosporanic acid

Treatment of 7-phenylacetamido-7-cyanodesacetoxycephalosporanic acid,p-methoxybenzyl ester in benzene with 2.1 mmoles anisole and 3.5 mmolestrifluoroacetic acid for 6 hours. The desired product is extracted fromthe acid solution in good yield.

EXAMPLE 237-Benzalimino-7-(o-nitrophenylsulfenyl)desacetoxycephalosporanic acid,methyl ester

7-Benzalimino-7-(o-nitrophenylsulfenyl)desacetoxycephalosporanic acid,methyl ester is prepared by the procedure of Example 12, but using anequivalent amount of o-nitrophenylsulfenyl chloride in place of cyanogenchloride.

EXAMPLE 24 7-Amino-7-(o-nitrophenylsulfenyl)desacetoxycephalosporanicacid, methyl ester

7-Amino-7-benzyldesacetoxycephalosporanic acid, methyl ester is preparedbyusing the product of Example 23 to replace the substrate 7-cyanocompound of Example 17.

EXAMPLE 257-Phenylacetamido-7-(o-nitrophenylsulfenyl)desacetoxycephalosporanicacid, methyl ester

7-Phenylacetamido-7-(o-nitrophenylsulfenyl)desacetoxycephalosporanicacid, methyl ester is prepared by using the product of Example 24 forthe substrate in Example 21.

EXAMPLE 267-Phenylacetamido-7-(o-nitrophenylsulfenyl)desacetoxycephalosporanicacid

7-Phenylacetamido-7-(o-nitrophenylsulfenyl)desacetoxycephalosporanicacid is prepared from the methyl ester of Example 25, following theprocedure of Example 22(b).

EXAMPLES 27-49

By following the procedures of Example 22 and substituting an equivalentamount of the corresponding acid chloride of the following carboxylicacids

α-(2-chlorophenoxy)propionic acid,

α-(4-sulfamylphenoxy)-n-butyric acid,

α-(3,4-dimethoxyphenoxy)-n-pentanoic acid,

α-(3-methylphenoxy)isovaleric acid,

α-(3-methylthiophenoxy)propionic acid,

α-(4-dimethylaminophenoxy)-n-hexanoic acid,

α-(2-methoxyphenoxy)-n-decanoic acid,

α-(2,4-dichlorophenoxy)phenylacetic acid,

α-(2-nitrophenoxy)-β-phenylpropionic acid,

α-(2-acetamidophenoxy)-γ-phenylbutyric acid,

α-(2,4-dimethylphenoxy)-n-butyric acid,

α-(4-isopropylphenoxy)propionic acid,

α-(3-bromophenoxy)-n-butyric acid,

α-(2-iodophenoxy)phenylacetic acid,

α-(2-diethylaminophenoxy)isovaleric acid,

α-(3,5-dichlorophenoxy)isohexanoic acid,

α-(4-cyclohexylphenoxy)propionic acid,

α-phenoxy-isovaleric acid,

α-phenoxy-n-decanoic acid,

α-phenoxy-δ-phenylbutyric acid,

α-(2-benzylphenoxy)-n-butyric acid,

α-(2-trifluoromethylphenoxy)propionic acid, and

α-(4-fluorophenoxy)propionic acid,

the products obtained are

7-[α-(2-chlorphenoxy)propionamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-(4-sulfamylphenoxy)-n-butyramido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-(3,4-dimethoxyphenoxy)n-pentanoamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-(3-methylphenoxy)isovaleramido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-(4-methylthiophenoxy)propionamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-(4-dimethylaminophenoxy)-n-hexanoamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-(2-methoxyphenoxy)-n-decanoamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-(2,4-dichlorophenoxy)phenylacetamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-(2-nitrophenoxy)-β-phenylpropionamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-(2-acetamidophenoxy)-δ-phenylbutyramido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-(2,4-dimethylphenoxy)-n-butyramido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-(4-isopropylphenoxy)propionamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-(3-bromophenoxy)-n-butyramido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-(2-iodophenoxy)phenylacetamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-(2-diethylaminophenoxy)isovaleramido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-(3,5-dichlorophenoxy)isohexanoamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-(4-cyclohexylphenoxy)propionamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-phenoxy-isovaleramido]-7-cyanodesacetoxycephalosporanic acid,

7-[α-phenoxy-n-decanoamido]-7-cyanodesacetoxycephalosporanic acid,

7-[α-phenoxy-δ-phenylbutyramido]-7-cyanodesacetoxycephalosporanic acid,

7-[α-(2-benzylphenoxy)-n-butyramido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-(2-trifluoromethylphenoxy)propionamido]-7-cyanodesacetoxycephalosporanicacid, and

7-[α-(4-fluorophenoxy)propionamido]-7-cyanodesacetoxycephalosporanicacid, respectively.

EXAMPLES 50-79

By following the procedures of Example 22 and substituting an equivalentamount of the corresponding acid chloride of the following carboxylicacids

α-phenylthiopropionic acid,

α-paranitrophenylthiopropionic acid,

-parachlorophenylthiopropionic acid,

α-phenylthiobutyric acid,

α-phenylthiocaproic acid,

α-phenylthioisovaleric acid,

α-(4-t-butylphenylthio)propionic acid,

α-ortho-tolythiopropionic acid,

α-ortho-nitrophenylthiopropionic acid,

α-parachlorophenylthiobutyric acid,

α-(3,4,5-trichlorophenylthio)propionic acid,

α-(3-trifluoromethylphenylthio)butyric acid,

α-parabromophenylthioisovaleric acid,

α-paraphenylphenylthiopropionic acid,

α-(4-methoxyphenylthio)caproic acid,

α-(4-cyclohexylphenylthio)butyric acid,

α-phenylthio-α-cyclohexylacetic acid,

α-(2,4-dichlorophenylthio)caproic acid,

α-(2,4-diisoamylphenylthio)propionic acid,

α-(4-benzylphenylthio)propionic acid,

α-(4-sulfamylphenylthio)butyric acid,

α-(2-allyloxyphenylthio)propionic acid,

α-(4-allylphenylthio)isovaleric acid,

α-(4-dimethylaminophenylthio)propionic acid,

α-(2,5-dichlorophenylthio)butyric acid,

α-(2-iodophenylthio)propionic acid,

α-(2-acetamidophenylthio)propionic acid,

α-(4-diethylaminophenylthio)propionic acid, and

α-(3-fluorophenylthio)butyric acid,

the products obtained are:

7-(α-phenylthiopropionamido)-7-cyanodesacetoxycephalosporanic acid,

7-(α-paranitrophenylthiopropionamido)-7-cyanodesacetoxycephalosporanicacid,

7-(α-parachlorophenylthiopropionamido)-7-cyanodesacetoxycephalosporanicacid,

7-(α-phenylthiobutyramido)-7-cyanodesacetoxycephalosporanic acid,

7-(α-phenylthiocaproamido)-7-cyanodesacetoxycephalosporanic acid

7-(α-phenylthioisovaleramido)-7-cyanodesacetoxycephalosporanic acid,

7-[α-(4-t-butylphenylthio)propionamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-ortho-tolythiopropionamido]-7-cyanodesacetoxycephalosporanic acid,

7-(α-ortho-nitrophenylthiopropionamido)-7-cyanodesacetoxycephalosporanicacid,

7-(α-parachlorophenylthiobutyramido)-7-cyanodesacetoxycephalosporanicacid,

7-[α-(3,4,5-trichlorophenylthio)propionamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-(3-trifluoromethylphenylthio)butyramido]-7-cyanodesacetoxycephalosporanicacid,

7-(α-parabromophenylthioisovaleramido)-7-cyanodesacetoxycephalosporanicacid,

7-(α-paraphenylphenylthiopropionamido)-7-cyanodesacetoxycephalosporanicacid,

7-[α-(4-methoxyphenylthio)caproamido]-7-cyanodesacetoxycephalosporanicacid

7-[α-(4-cyclohexylphenylthio)butyramido]-7-cyanodesacetoxycephalosporanicacid,

7(α-phenylthio-α- -cyclohexylacetamido)-7-cyanodesacetoxycephalosporanicacid,

7-[α-(2,4-dichlorophenylthio)caproamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-(2,4-diisoamylphenylthio)propionamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-(4-benzylphenylthio)propionamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-(4-sulfamylphenylthio)butyramido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-(2-allyloxyphenylthio)propionamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-(4-allylphenylthio)isovaleramido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-(4-dimethylaminophenylthio)propionamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-(2,5-dichlorophenylthio)butyramido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-(2-iodophenylthio)propionamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-(2-acetamidophenylthio)propionamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-(4-diethylaminophenylthio)propionamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-(3-fluorophenylthio)butyramido]-7-cyanodesacetoxycephalosporanicacid,respectively.

EXAMPLES 80-93

By following the procedures of Example 22 and substituting an equivalentamount of the corresponding acid chloride of the following carboxylicacids

D,l-α-amino-(3-thienyl)acetic acid,

α-amino-(5-ethyl-2-thienyl)acetic acid,

α-amino-(5-methyl-2-thienyl)acetic acid,

α-amino-(5-t-butyl-2-thienyl)acetic acid,

α-amino-(2,5-dimethyl-3-thienyl)acetic acid,

α-amino-(5-chloro-2-thienyl)acetic acid,

α-amino-(5-bromo-2-thienyl)acetic acid,

α-amino-(5-phenyl-3-chloro-2-thienyl)acetic acid,

α-amino-(3,5-dimethyl-2-thienyl)acetic acid,

α-amino-(5-cyclohexyl-2-thienyl)acetic acid,

α-amino-(5-diethylamino-2-thienyl)acetic acid,

α-amino-(4-methylsulfonyl-2-thienyl)acetic acid,

α-amino-(3-ethylthio-2-thienyl)acetic acid, and

α-amino-(4-cycloheptyloxy-2-thienyl)acetic acid,

the products obtained are

D,l-7-[α-amino-(3-thienyl)acetamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-amino-(5-ethyl-2-thienyl)acetamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-amino-(5-methyl-2-thienyl)acetamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-amino-(5-t-butyl)-2-thienyl)acetamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-amino-(2,5-dimethyl-3-thienyl)acetamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-amino-(5-chloro-2-thienyl)acetamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-amino-(5-bromo-2-thienyl)acetamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-amino-(5-phenyl-3-chloro-2-thienyl)acetamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-amino-(3,5-dimethyl-2-thienyl)acetamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-amino-(5-cyclohexyl-2-thienyl)acetamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-amino-(5-diethylamino-2-thienyl)acetamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-amino-(4-methylsulfonyl-2-thienyl)acetamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-amino-(3-ethylthio-2-thienyl)acetamido]-7-cyano-desacetoxycephalosporanicacid,

7-[α-amino-(4-cycloheptyloxy-2-thienyl)acetamido]-7-cyanodesacetoxycephalosporanic acid, respectively.

EXAMPLE 94-116

By following the procedures of Example 22 and substituting an equivalentamount of the corresponding acid chloride of the following carboxylicacids

α-amino-p-chlorophenylacetic acid,

α-amino-p-methoxyphenylacetic acid,

L-(+)-α-aminophenylacetic acid,

α-amino-4-diethylaminophenylacetic acid,

α-amino-4-trifluoromethylphenylacetic acid,

α-amino-2,4-dibromophenylacetic acid,

α-amino-2-nitrophenylacetic acid,

α-amino-3-methylphenylacetic acid,

α-amino-4-sulfamylphenylacetic acid,

α-amino-2-iodophenylacetic acid,

α -amino-4-t-butylphenylacetic acid,

α-amino-2-acetamidophenylacetic acid,

α-amino-3-nitrophenylacetic acid,

α-amino-3,4-dimethoxyphenylacetic acid,

α-amino-4-dimethylaminophenylacetic acid,

α-amino-2,4-dichlorophenylacetic acid,

α-amino-4-isopropylphenylacetic acid,

α-amino-3-bromophenylacetic acid,

α-amino-3-iodophenylacetic acid,

α-amino-2-diethylaminophenylacetic acid,

α-amino-2-trifluoromethylphenylacetic acid,

α-amino-4-fluorophenylacetic acid, and

α -amino-3,4,5-trifluoromethylphenylacetic acid,

the products obtained are

7-(α-amino-p-chlorophenylacetamido)-7-cyanodesacetoxycephalosporanicacid,

7-(α-amino-p-methoxyphenylacetamido)-7-cyanodesacetoxycephalosporanicacid,

7-[L-(+)-α-aminophenylacetamido]-7-cyanodesacetoxy cephalosporanic acid,

7-(α-amino-4-diethylaminophenylacetamido)-7-cyanodesacetoxycephalosporanicacid,

7-(α-amino-4-trifluoromethylphenylacetamido)-7-cyanodesacetoxycephalosporanicacid,

7-(α-amino-2,4- dibromophenylacetamido)-7-cyanodesacetoxycephalosporanicacid,

7-(α-amino-2-nitrophenylacetamido)-7-cyanodesacetoxycephalosporanicacid,

7-(α-amino-3-methylphenylacetamido)-7-cyanodesacetoxycephalosporanicacid,

7-(α-amino-4-sulfamylphenylacetamido)-7-cyanodesacetoxycephalosporanicacid,

7-(α-amino-2-iodophenylacetamido)-7-cyanodesacetoxycephalosporanic acid,

7-(α-amino-4-t-butylphenylacetamido)-7-cyanodesacetoxycephalosporanicacid,

7-(α-amino-2-acetamidophenylacetamido)-7-cyanodesacetoxycephalosporanicacid,

7-(α-amino-3-nitrophenylacetamido)-7-cyanodesacetoxycephalosporanicacid,

7-(α-amino-3,4-dimethoxyphenylacetamido)-7-cyanodesacetoxycephalosporanicacid,

7-(α-amino-4-dimethylaminophenylacetamido)-7-cyanodesacetoxycephalosporanicacid,

7-(α-amino-2,4-dichlorophenylacetamido)-7-cyanodesacetoxycephalosporanicacid,

7-(α-amino-4-isopropylphenylacetamido)-7-cyanodesacetoxycephalosporanicacid,

7-(α-amino-3-bromophenylacetamido)-7-cyanodesacetoxycephalosporanicacid,

7-(α-amino-3-iodophenylacetamido)-7-cyanodesacetoxycephalosporanic acid,

7-(α-amino-2-diethylaminophenylacetamido)-7-cyanodesacetoxycephalosporanicacid,

7-(α-amino-2-trifluoromethylphenylacetamido)-7-cyanodesacetoxycephalosporanic acid,

7-(α-amino-4-fluorophenylacetamido)-7-cyanodesacetoxycephalosporanicacid, and

7-(α-amino-3,4,5-trifluoromethylphenylacetamido)-7-cyanodesacetoxycephalosporanicacid, respectively.

EXAMPLES 117-187

By following the procedures of Example 22 and substituting an equivalentamount of the corresponding acid chloride: benzoyl chloride,

3,5-dinitrobenzoyl chloride,

2-chlorobenzoyl chloride,

2-methylbenzoyl chloride,

4-aminobenzoyl chloride,

4-nitrobenzoyl chloride,

4-hydroxybenzoyl chloride,

3,4,5-trimethoxybenzoyl chloride,

4-methylbenzoyl chloride,

4-chlorobenzoyl chloride,

3,4-dichlorobenzoyl chloride,

3-nitrobenzoyl chloride,

2,4,6-trimethoxybenzoyl chloride,

2-hydroxybenzoyl chloride,

4-ethoxybenzoyl chloride,

2,6-dimethoxybenzoyl chloride,

2,4,6-trimethylbenzoyl chloride,

2,6-dichlorobenzoyl chloride,

2,6-diethoxybenzoyl chloride,

2,6-di-n-butyoxybenzoyl chloride,

2,6-dibenzyloxybenzoyl chloride,

2,3,6-trimethoxybenzoyl chloride,

2,4,6-tribromobenzoyl chloride,

2,6-di-n-propoxybenzoyl chloride,

2,6-dimethoxy-4-methylbenzoyl chloride,

4,6-diethyl-2-methoxybenzoyl chloride,

6-ethoxy-2-methoxybenzoyl chloride,

2-methylthiobenzoyl chloride,

2-benzylthiobenzoyl chloride,

2-phenoxybenzoyl chloride,

2-phenylbenzoyl chloride,

2-methoxybenzoyl chloride,

4-sulfamylbenzoyl chloride,

3,4-dimethoxybenzoyl chloride,

4-methoxybenzoyl chloride,

3-methylbenzoyl chloride,

3-dimethylaminobenzoyl chloride,

2-methoxybenzoyl chloride,

2-chloro- 3,4,5-trimethoxybenzoyl chloride,

2,4-dichlorobenzoyl chloride,

2-nitrobenzoyl chloride,

4-methylaminobenzoyl chloride,

2-acetamidobenzoyl chloride,

2,4-dimethylbenzoyl chloride,

2,4,5-trimethylbenzoyl chloride,

4-isopropylbenzoyl chloride,

3-bromobenzoyl chloride,

2-iodobenzoyl chloride,

2-ethylaminobenzoyl chloride,

2,5-dihydroxybenzoyl chloride,

4-hydroxy-3-methoxybenzoyl chloride,

4-allylbenzoyl chloride,

4-allyloxybenzoyl chloride,

2-trifluoromethylbenzoyl chloride,

4-fluorobenzoyl chloride,

2-phenylthiobenzoyl chloride,

2-benzylbenzoyl chloride,

2,6-dihydroxybenzoyl chloride,

2,6-diacetoxybenzoyl chloride,

2,6-dimethylthiobenzoyl chloride,

2,4,6-trinitrobenzoyl chloride,

2,6-diacetamidobenzoyl chloride,

2,6-dibromobenzoyl chloride,

2,6-dimethylbenzoyl chloride,

2,6-diethylbenzoyl chloride,

2,6-diisopropylbenzoyl chloride,

2,6-diallyloxybenzoyl chloride,

3-bromo-2,6-dimethoxybenzoyl chloride,

4-chloro-2,6-dimethoxybenzoyl chloride,

2-chloro- 6-nitrobenzoyl chloride, and

2-hydroxy-6-methoxybenzoyl chloride,

the products obtained are

7-(benzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(3,5-dinitrobenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2-chlorobenzamido)-7 -cyanodesacetoxycephalosporanic acid,

7-(2-methylbenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(4-aminobenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(4-nitrobenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(4-hydroxybenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(3,4,5-trimethoxybenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(4-methylbenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(4-chlorobenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(3,4-dichlorobenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(3-nitrobenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2,4,6-trimethoxybenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2-hydroxybenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(4-ethoxybenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2,6-dimethoxybenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2,4,6-trimethylbenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2,6-dichlorobenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2,6-diethoxybenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2,6-di-n-butoxybenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2,6-dibenzyloxybenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2,3,6-trimethoxybenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2,4,6-tribromobenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2,6-di-n-propoxybenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2,6-dimethoxy-4-methylbenzamido)-7-cyanodesacetoxycephalosporanicacid,

7-(4-6-diethyl-2-methoxybenzamido)-7-cyanodesacetoxycephalosporanicacid,

7-(6-ethoxy-2-methoxybenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2-methylthiobenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2-benzylthiobenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2-phenoxybenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2-phenylbenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2-methoxybenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(4-sulfamylbenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(3,4-dimethoxybenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(4-methoxybenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(3-methylbenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(3-dimethylaminobenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2-methoxybenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2-chloro-3,4,5-trimethoxybenzamido)-7-cyanodesacetoxycephalosporanicacid,

7-(2,4-dichlorobenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2-nitrobenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(4-methylaminobenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2-acetamidobenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2,4-dimethylbenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2,4,5-trimethylbenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(4-isopropylbenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(3-bromobenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2-iodobenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2-ethylaminobenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2,5-dihydroxybenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(4-hydroxy-3-methoxybenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(4-allylbenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(4-allyloxybenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2-trifluoromethylbenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(4-fluorobenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2-phenylthiobenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2-benzylbenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2,6-dihydroxybenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2,6-diacetoxybenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2,6-dimethylthiobenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2,4,6-trinitrobenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2,6-diacetamidobenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2,6-dibromobenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2,6-dimethylbenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2,6-diethylbenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2,6-diisopropylbenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2,6-diallyloxybenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(3-bromo-2,6-dimethoxybenzamido)-7-cyanodesacetoxycephalosporanicacid,

7-(4-chloro-2,6-dimethoxybenzamido)-7-cyanodesacetoxycephalosporanicacid,

7-(2-chloro-6-nitrobenzamido)-7-cyanodesacetoxycephalosporanic acid,

7-(2-hydroxy-6-methoxybenzamido)-7-cyanodesacetoxycephalosporanic acid,respectively.

EXAMPLES 188-198

By following the procedures of Example 22 and substituting an equivalentamount of the corresponding acid chloride:

(4-nitrophenyl)acetyl chloride,

(4-bromophenyl)acetyl chloride,

(4-t-butylphenyl)acetyl chloride,

(4-trifluoromethylphenyl)acetyl chloride,

(3-fluorophenyl)acetyl chloride,

(4-sulfamylphenyl)acetyl chloride,

(2-benzylphenyl)acetyl chloride,

(3-methoxyphenyl)acetyl chloride,

(2-iodophenyl)acetyl chloride,

(3-diethylaminophenyl)acetyl chloride, and

(2,4-diisoamylphenyl)acetyl chloride,

the products obtained are

7-[α-(4-nitrophenyl)acetamido]-7-cyanodesacetoxycephalosporanic acid,

7-[α-(4-bromophenyl)acetamido]-7-cyanodesacetoxycephalosporanic acid,

7-[α-(4-t-butylphenyl)acetamido]-7-cyanodesacetoxycephalosporanic acid,

7-[α-(4-trifluoromethylphenyl)acetamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-(3-fluorophenyl)acetamido]-7-cyanodesacetoxycephalosporanic acid,

7-[α-(4-sulfamylphenyl)acetamido]-7-cyanodesacetoxycephalosporanic acid,

7-[α-(2-benzylphenyl)acetamido]-7-cyanodesacetoxycephalosporanic acid,

7-[α-(3-methoxyphenyl)acetamido]-7-cyanodesacetoxycephalosporanic acid,

7-[α-(2-iodophenyl)acetamido]-7-cyanodesacetoxycephalosporanic acid,

7-[α-(3-diethylaminophenyl)acetamido]-7-cyanodesacetoxycephalosporanicacid, and

7-[α-(2,4-diisoamylphenyl)acetamido]-7-cyanodesacetoxycephalosporanicacid,respectively.

EXAMPLES 199-246

By following the procedures of Example 22 and substituting an equivalentamount of the corresponding acid chloride:

3-m-chlorophenyl-5-methyl-4-isoxazole-4-carbonyl chloride,

3-(2,4-dichlorophenyl)-5-methyl-4-isoxazole-4-carbonyl chloride,

3-(3,4-dichlorophenyl)-5-methyl-4-isoxazole-4-carbonyl chloride,

3-p-tolyl-5-methyl-4-isoxazole-4-carbonyl chloride,

3-o-nitrophenyl-5-methyl-4-isoxazole-4-carbonyl chloride,

3-m-nitrophenyl-5-methyl-4-isoxazole-4-carbonyl chloride,

3-p-nitrophenyl-5-methyl-4-isoxazole-4-carbonyl chloride,

3-p-bromophenyl-5-methyl-4-isoxazole-4-carbonyl chloride

3-p-fluorophenyl-5-methyl-4-isoxazole-4-carbonyl chloride,

3-p-methylsulfonylphenyl-5-methyl-4-isoxazole-4-carbonyl chloride,

3-p-methoxyphenyl-5-methyl-4-isoxazole-4-carbonyl chloride,

3-p-trifluoromethylphenyl-5-methyl-4-isoxazole-4-carbonyl chloride,

3-o-methoxyphenyl-5-methyl-4-isoxazole-4-carbonyl chloride,

3-p-ethoxyphenyl-5-methyl-4-isoxazole-4-carbonyl chloride,

3-(3,4-dimethoxyphenyl)-5-methyl-4-isoxazole-4-carbonyl chloride,

3-p-dimethylaminophenyl-5-methyl-4-isoxazole-4-carbonyl chloride,

3α-naphthyl-5-methyl-4-isoxazole-4-carbonyl chloride,

3-β-naphthyl-5-methyl-4-isoxazole-4-carbonyl chloride,

3-phenyl-5-ethyl-4-isoxazole-4-carbonyl chloride,

3-p-chlorophenyl-5-ethyl-4-isoxazole-4-carbonyl chloride,

3-phenyl-5-isopropyl-4-isoxazole-4-carbonyl chloride,

3-phenyl-5-methylmercapto-4-isoxazole-4-carbonyl chloride,

3-methyl-5-o-chlorophenyl-4-isoxazole-4-carbonyl chloride,

3-methyl-5-p-bromophenyl-4-isoxazole-4-carbonyl chloride,

3-methyl-5-o-iodophenyl-4-isoxazole-4-carbonyl chloride,

3-methyl-5-(2,4-dichlorophenyl)-4-isoxazole-4-carbonyl chloride,

3-methyl-5-m-nitrophenyl-4-isoxazole-4-carbonyl chloride,

3-methyl-5-p-tolyl-4-isoxazole-4-carbonyl chloride,

3-methyl-5-p-nitrophenyl-4-isoxazole-4-carbonyl chloride,

3-methyl-5-p-methoxyphenyl-4-isoxazole-4-carbonyl chloride,

3-methyl-5-p-ethoxyphenyl-4-isoxazole-4-carbonyl chloride,

3-methyl-5-(2,6-dimethoxyphenyl)-4-isoxazole-4-carbonyl chloride,

3-methyl-5-p-methylsulfonylphenyl-4-isoxazole-4-carbonyl chloride,

3-methyl-5-p-fluorophenyl-4-isoxazole-4-carbonyl chloride,

3-methyl-5-p-cyanophenyl-4-isoxazole-4-carbonyl chloride,

3-methyl-5-p-methylmercaptophenyl-4-isoxazole-4-carbonyl chloride,

3-methyl-5-p-dimethylaminophenyl-4-isoxazole-4-carbonyl chloride,

3-methyl-5-α-naphthyl-4-isoxazole-4-carbonyl chloride,

3-methyl-5-β-naphthyl-4-isoxazole-4-carbonyl chloride,

3-ethyl-5-phenyl-4-isoxazole-4-carbonyl chloride,

3-ethyl-5-p-chlorophenyl-4-isoxazole-4-carbonyl chloride,

3-isopropyl-5-phenyl-4-isoxazole-4-carbonyl chloride,

3-tert. butyl-5-methyl-4-isoxazole-4-carbonyl chloride,

3-methyl-5-p-trifluoromethylphenyl-4-isoxazole-4-carbonyl chloride,

3-methyl-5-cyclohexyl-4-isoxazole-4-carbonyl chloride,

3-cyclohexyl-5-methyl-4-isoxazole-4-carbonyl chloride,

3-α-furyl-5-methyl-4-isoxazole-4-carbonyl chloride, and

3-α-thienyl-5-methyl-4-isoxazole-4-carbonyl chloride,

the products obtained are

3-m-chlorophenyl-5-methyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-(2,4-dichlorophenyl)-5-methyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-(3,4-dichlorophenyl)-5-methyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-p-tolyl-5-methyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-o-nitrophenyl-5-methyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-m-nitrophenyl-5-methyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-p-nitrophenyl-4-methyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-p-bromophenyl-5-methyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-p-fluorophenyl-5-methyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-p-methylsulfonylphenyl-5-methyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-p-methoxyphenyl-5-methyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanic acid,

3-p-trifluoromethylphenyl-5-methyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-o-methoxyphenyl-5-methyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-p-ethoxyphenyl-5-methyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-(3,4-dimethoxyphenyl)-5-methyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-p-dimethylaminophenyl-5-methyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-α-naphthyl-5-methyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-β-naphthyl-5-methyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-phenyl-5-ethyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-p-chlorophenyl-5-ethyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-phenyl-5-isopropyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-phenyl-5-methylmercapto-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-methyl-5-o-chlorophenyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-methyl-5-p-bromophenyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-methyl-5-o-iodophenyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-methyl-5-m-nitrophenyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-methyl-5-p-tolyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-methyl-5-p-nitrophenyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-methyl-5-p-methoxyphenyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-methyl-5-p-ethoxyphenyl-4-isoxazolylcarbonyl-7-cyanodesacetoxycephalosporanicacid,

3-methyl-5-(2,6-dimethoxyphenyl)-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-methyl-5-p-methylsulfonylphenyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid

3-methyl-5-p-fluorophenyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-methyl-5-p-cyanophenyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-methyl-5-p-methylmercaptophenyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-methyl-5-p-dimethylaminophenyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-methyl-5-α-naphthyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-methyl-5-β-naphthyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-ethyl-5-phenyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-ethyl-5-phenyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-ethyl-5-p-chlorophenyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-isopropyl-5-phenyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-tert.butyl-5-methyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-methyl-5-p-trifluoromethylphenyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-methyl-5-cyclohexyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-cyclohexyl-5-methyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-α-furyl-5-methyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-α-thienyl-5-methyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid, respectively.

EXAMPLES 247-261

By following the procedures of Example 22 and substituting an equivalentamount of the corresponding acid chloride:

3,5-diphenyl-4-isoxazole-4-carbonyl chloride,

3-methyl-5-phenyl-4-isoxazole-4-carbonyl chloride,

3,5-dimethyl-4-isoxazole-4-carbonyl chloride,

5-benzyl-3-methyl-4-isoxazole-4-carbonyl chloride,

3-methyl-5-styryl-4-isoxazole-4-carbonyl chloride,

5-tert. butyl-3-phenyl-4-isoxazole-4-carbonyl chloride,

5-(2-furyl)-3-methyl-4-isoxazole-4-carbonyl chloride,

3-methyl-5-(3',5'-dimethyl-4'-isoxazolyl)-4-isoxazole-4-carbonylchloride,

3-methyl-5-(2-thienyl)-4-isoxazole-4-carbonyl chloride,

3-(p-chlorophenyl)-5-methyl-4-isoxazole-4-carbonyl chloride,

3-methyl-5-methylmercapto-4-isoxazole-4-carbonyl chloride,

5-(p-chlorophenyl)-3-methyl-4-isoxazole-4-carbonyl chloride,

3-methyl-5-(o-nitrophenyl)-4-isoxazole-4-carbonyl chloride,

5-isopropyl-3-methyl-4-isoxazole-4-carbonyl chloride, and

5-methyl-3-(p-chlorophenyl)-4-isoxazole-4-carbonyl chloride,

the products obtained are

3,5-diphenyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-methyl-5-phenyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3,5-dimethyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

5-benzyl-3-methyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-methyl-5-styryl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

5-tert.butyl-3-phenyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

5-(2-furyl)-3-methyl-4-isoxazolylcarbonylamino-7-cyanodesacetoxycephalosporanicacid,

3-methyl-5-(3'-5'-dimethyl-4'-isoxazolyl)-4-isoxazolylcarbonylamido-7-cyanodesacetoxycephalosporanicacid,

3-methyl-5-(2-thienyl)-4-isoxazolylcarbonylamido-7-cyanodesacetoxycephalosporanicacid,

3-(p-chlorophenyl)-5-methyl-4-isoxazolylcarbonylamido-7-cyanodesacetoxycephalosporanicacid,

3-methyl-5-methylmercapto-4-isoxazolylcarbonylamido-7-cyanodesacetoxycephalosporanicacid,

5-(p-chlorophenyl)-3-methyl-4-isoxazolylcarbonylamido-7-cyanodesacetoxycephalosporanicacid,

3-methyl-5-(o-nitrophenyl)-4-isoxazolylcarbonylamido-7-cyanodesacetoxycephalosporanicacid,

5-isopropyl-3-methyl-4-isoxazolylcarbonylamido-7-cyanodesacetoxycephalosporanicacid, and

5-methyl-3-(p-chlorophenyl)-4-isoxazolylcarbonylamido-7-cyanodesacetoxycephalosporanicacid, respectively.

EXAMPLES 262-275

By following the procedures of Example 22 and substituting an equivalentamount of the corresponding acid chloride:

α -(3-thienyl)glycyl chloride,

α-(5-ethyl-2-thienyl)glycyl chloride,

α-(5-methyl-2-thienyl)glycyl chloride,

α-(5-t-butyl-2-thienyl)glycyl chloride,

α-(2,5-dimethyl-3-thienyl)glycyl chloride,

α-(5-chloro-2-thienyl)glycyl chloride,

α-(5-bromo-2-thienyl)glycyl chloride,

α-(5-phenyl-3-chloro-2-thienyl)glycyl chloride,

α-(3,5-dimethyl-2-thienyl)glycyl chloride,

α-(5-cyclohexyl-2-thienyl)glycyl chloride,

α-(5-diethylamino-2-thienyl)glycyl chloride,

α-(4-methylsulfonyl-2-thienyl)glycyl chloride,

α-(3-ethylthio-2-thienyl)glycyl chloride, and

α-(4-cycloheptyloxy-2-thienyl)glycyl chloride, respectively,

the products obtained are

7-[α-amino-(3-thienyl)acetamido]-7-cyanodesacetoxycephalosporanic acid,

D,l-7-[α-amino(5-ethyl-2-thienyl)acetamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-amino-(5-methyl-2-thienyl)acetamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-amino-(5-t-butyl-2-thienyl)acetamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-amino-(2,5-dimethyl-3-thienyl)acetamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-amino-(5-chloro-2-thienyl)acetamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-amino-(5-bromo-2-thienyl)acetamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-amino-(5-phenyl-3-chloro-2-thienyl)acetamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-amino-(3,5-dimethyl-2-thienyl)acetamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-amino-(5-cyclohexyl-2-thienyl)acetamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-amino-(5-diethylamino-2-thienyl)acetamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-amino-(4-methylsulfonyl-2-thienyl)acetamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-amino-(3-ethylthio-2-thienyl)acetamido]-7-cyanodesacetoxycephalosporanicacid,

7-[α-amino-(4-cycloheptyloxy-2-thienyl)acetamido]-7-cyanodesacetoxycephalosporanicacid, respectively.

EXAMPLE 276 Preparation of 7-acetyl 7-phenylacetamidodesacetoxycephalosporanic acid

(a) Acylation of 7-benzaliminodesacetoxycephalosporanic acid, t-butylester

A solution of 200 mg. of 7-benzaliminodesacetoxycephalosporanic acid,t-butyl ester in 30 ml. of dimethoxyethane is cooled to -15° C. under N₂and 63 mg. of potassium t-butoxide was added. The red solution was thencooled to -40° C. and .07 ml. of acetyl chloride in 2 ml.dimethoxyethane added. The resulting straw colored solution was thenimmediately poured into ice cold phosphate buffer having a pH of 6.8 andextracted with chloroform. The organic extract is washed with water,then dried (sodium sulfate) and evaporated at reduced pressure. Theproduct, 209 mg. shows ^(max) 1775, 1720, 163.5 cm⁻ ¹ ; nmr 1.58 (9H,t-butyl); 2.10 (3H, 3-CH₃); 2.35 (3H, COCH₃); 3.40 (2H, S-CH₂); 5.46(1H, C₆ H); 7.3 8.0 (5H, Φ-); 8.72 (1H, -CH=N). PPM (from TMO).

(b) 7-Amino-7-acetyldesacetoxycephalosporanic acid, t-butyl ester

The above product is dissolved in 10 ml. of ethyl acetate and 1 eq. ofp-toluenesulfonic acid and a drop of water added. The reaction isstirred at room temperature. The suspension is diluted with 10 ml. ofethyl acetate and then extracted with 0.2N HCl. The aqueous extractswere then adjusted to pH 8 and the free base extracted into ethylacetate which was then dried (sodium sulphate) and evaporated at reducedpressure to leave the product, 80 mg., infrared _(film) ^(max) 3380,3320, 1765, 1720 cm⁻ ¹.

(c) 7-Phenylacetamido-7-acetyldesacetoxycephalosporanic acid, t-butylester

(i) By following the procedure of Example 21, but substituting 3.25 eq.of 7-amino-7-acetyldesacetoxycephalosporanic acid, t-butyl ester thedesired product is obtained.

(ii) A solution of 1 meq. of7-benzalimino-7-acetyldesacetoxycephalosporanic acid, t-butyl ester in15 ml. ethyl acetate is treated with 1 meq. each of phenylacetylchloride andtriethylamine at 0° C. After stirring for 15", 1 ml. ofwater is added and the cooling bath removed. Stirring is continued for 1hour. The organic layer is then washed with cold 1% aqueous NaHCO₃,water and 0.1N HCl, and then dried (MgSO₄) and evaporated at reducedpressure to deposit the product.

(d) 7-Acetyl-7-phenylacetamidodesacetoxycephalosporanic acid

A solution of 100 mg. of the previous examples' product in 3 ml.trifluoroacetic acid is prepared and kept at 0° C. for 5"; the solventis then evaporated at reduced pressure to leave the product.

EXAMPLES 277-298

By following the procedure of Example 276 but using the reactants belowin place of acetyl chloride.

benzoyl chloride,

p-nitrobenzoyl chloride,

m-bromobenzoyl chloride,

ethyl chloroformate,

ethyl bromoacetate,

o-nitrophenylsulfenyl chloride,

phenylsulfenyl chloride,

p-toluenesulfonyl chloride,

methylsulfonyl chloride,

methyl sulfenyl chloride,

chloroacetyl chloride,

acetic anhydride,

dimethylaminomethyl chloride,

phenylacetyl chloride,

benzoylmethyl chloride,

m-piperidylcarbonyl chloride,

trifluoroacetic anhydride,

p-nitrophenyl benzoate,

5-nitrofuroyl chloride,

5-nitrothiophenecarbonyl chloride,

dimethylaminocarbonyl chloride,

perchloryl fluoride,

the corresponding products are obtained:

7-benzoyl-7-(phenylacetamido)desacetoxycephalosporanic acid, and the

7-(p-nitrobenzoyl),

7-(m-bromobenzoyl),

7-(ethoxycarbonyl),

7-(carbethoxymethyl),

7-(o-nitrophenylsulfenyl),

7-phenylsulfenyl,

7-p-toluenesulfonyl,

7-methylsulfonyl,

7-methyl thio,

7-chloroacetyl,

7-acetyl,

7-(dimethylaminomethyl),

7-phenylacetyl,

7-benzoylmethyl,

7-(m-piperidylcarbonyl),

7-trifluoroacetyl,

7-(p-nitrophenylcarbonyl),

7-(5-nitrofurylcarbonyl),

7-(5-nitrothiophenecarbonyl),

7-(dimethylaminocarbonyl),

7-fluoro - derivatives thereof are obtained.

EXAMPLE 299

A solution of 200 mg of 7-benzaliminodesacetoxycephalosporanic acid,t-butyl ester in 30 ml of dimethoxyethane is cooled to -35° C. under anitrogen atmosphere; 63 mg of potassium t-butoxide is added. A stream ofperchloryl fluoride diluted with nitrogen gas is then passed through thesolution until the red color becomes a pale yellow. Theexcessfluorinating agent is purged from the reaction by the nitrogenstream. The solution is diluted with chloroform and the result quicklyfiltered through a silica gel column. The solution is evaporated atreduced pressure to provide7-fluoro-7-benzaliminodesacetoxycephalosporanic acid, t-butyl ester. Theproduct is taken up in chloroform, 5 ml, and 100 mg phenol added at roomtemperature. The reaction is monitored by nmr observation of the C-6proton. When complete, the solvents are evaporated at reduced pressureat room temperature or below. The residue, containing7-benzalimino-7-phenoxydesacetoxycephalosporanic acid, t-butyl ester istaken up in 25 ml. of chloroform at 20° C. Phenoxyacetyl chloride, 80mg., is added. After 20 minutes, 0.5 ml. of water is added as well as 60mg. of triethylamine. The reaction is stirred at 20± 5° C. for 3 hours,then washed with 3× 20 ml. of 5% aqueous sodium bicarbonate solution,water and 1× 20 ml. of cold 1N HCl. The organic solution is dried (Na₂SO₄) and evaporated to deposit the product, 7-phenoxyacetamido-7-phenoxydesacetoxycephalosporanic acid, t-butyl ester. The free acid isprepared by dissolving this residue in 1 ml. of trifluoroacetic acid (at0° C.) then warming to room temperature over a 5 minute span, followedby evaporation of the trifluoroacetic acid.

EXAMPLES 300-311

By following the preceding example but substituting for phenol:

1 eq. isopropyl alcohol,

1 eq. benzyl alcohol,

1 eq. p-nitro phenol,

1 eq. dimethylamine,

1 eq. diethylamine,

1 eq. n-methylbenzylamine,

1 eq. thiophenol,

methanol,

ethanol,

methanethiol,

acetic acid,

benzoic acid,

the followng products are obtained:

7-phenoxyacetamido-7-isopropoxy-desacetoxycephalosporanic acid, and the

benzyloxy -

p-nitrophenoxy-

dimethylamino -

diethylamino -

n-methylbenzylamino -

phenylthio -

methoxy -

ethoxy -

methylthio -

acetoxy -

benzoyloxy - derivatives thereof are obtained.

EXAMPLE 312 7-Aminocephalosporanic acid, t-butyl ester.

To 50 ml. peroxide free dioxane was added dropwise, at 5° to 10° C., 5ml. concentrated sulphuric acid in a pressure bottle. Then 5 gr.7-aminocephalosporanic acid and 25 ml. liquid iso-butylene wereadded.The bottle was sealed and shaken at room temperature for two (2) hours.The reaction mixture was then cooled to -70° C. and poured into anice-cold mixture of 20 gr. sodium bicarbonate in 250 ml. water and125ml. ethyl acetate. The aqueous layer was then washed several timeswithethyl acetate. The organic extracts were washed with water, driedover magnesium sulphate, and evaporated to dryness. The residuesolidified and was triturated with cyclohexane. The solid was filteredoff to give 3.5 grams of the desired product. MP-105°-107° C.

EXAMPLE 313 N-Benzylidene-7-aminocephalosporanic acid, t-butyl ester.

15.5 milli-equivalents 7-aminocephalosporanic acid, t-butyl ester weredissolved in 100 ml. benzene. This was followed by the addition of 15.5milli-equivalents benzaldehyde and 10 grams magnesium sulphate. Thereaction was allowed to proceed at room temperature overnight. Themagnesium sulphate was removed by filtration and the filtrate wasevaporated to dryness in vacuo to leave the desired product as a yellowoil in 82% yield.

EXAMPLE 314 N-Benzylidene-7-acetyl-7-aminocephalosporanic acid, t-butylester.

3.2 milliequivalents N-Benzylidene-7-amino-cephalosporanic acid, t-butylester were dissolved in 25 ml anhydrous DME and cooled to -40° C. Then3.2 milliequivalents potassium t-butoxide were added followed by theaddition after 5 minutes of 3.5 equivalents acetyl chloride. Thereaction was completed in about 5 minutes. The reaction mixture waspoured into water, washed with chloroform, dried over magnesiumsulphate, and evaporated to dryness in vacuo to give the desired productas a solid. Yield - 75%.

EXAMPLE 315 7-Acetyl-7-aminocephalosporanic acid, t-butyl ester 5.5equivalents N-Benzylidene-7-acetyl-7-aminocephalosporanic acid, t-butylester was dissolved in 500 ml. ethyl acetate and 11 equivalentsp-toluenesulphonic acid and 11 equivalents water were added. Thereaction mixture was shirredat room temperature for four (4) hours. Asolid precipitated out. This solid was removed by filtration anddistributed between chloroform and dilute sodium bicarbonate in aseparatory funnel. The chloroform layer waswashed with water, dried overmagnesium sulphate and evaporated to dryness to give the desired freeamine as a solid in 55% yield. EXAMPLE 3167-Acetyl-7-phenylacetamido-cephalosporanic acid.

5.3 milliequivalents 7-acetyl-7-phenylacetamidocephalosporanic acid,t-butyl ester were treated with 2 ml. trifluoro-acetic (TFA) acid for 2minutes. The TFA was removed by evaporation in vacuo. The residual oilwasdissolved in chloroform and washed into dilute sodium bicarbonate.The bicarbonate layer was washed with chloroform, acidified to pH 1.5with dilute hydrochloric acid and extracted with methylene chloride. Thelatterextracts were washed over magnesium sulphate and evaporated todryness to give the desired acid as a solid in 27% yield.

What is claimed is:
 1. A compound of the formula: ##STR7## wherein R³ isselected from the group consisting of phenylthio and substitutedphenylthio wherein said substituent is selected from the groupconsisting of halogen, hydroxy, amino, nitro and lower alkyl; R⁴ isselected from the group consisting of hydrogen, lower alkyl,trichloroethyl, benzyl, methoxybenzyl, and benzhydryl; Y is selectedfrom the group consisting of hydrogen, acetoxy, pyridinium, and hydroxy;and R is selected from the group consisting of ##STR8## and ##STR9##wherein n is zero or one, X₁ is O or S, and R² is selected from thegroup consisting of thienyl, phenyl, and mono and disubstituted phenyland thienyl wherein said substituents are selected from the groupconsisting of chloro, bromo, nitro, lower alkyl, and lower alkoxy; andpharmaceutically acceptable salts thereof.
 2. The compound of claim 1wherein R³ is phenylthio or nitrophenylthio; Y is hydrogen or acetoxy;and R is ##STR10##
 3. The compound of claim 2 wherein R³ isnitrophenylthio; Y and R⁴ are both hydrogen.
 4. The compound of claim 2wherein R³ is nitrophenylthio; Y is acetoxy; and R⁴ is hydrogen.
 5. Thecompound of claim 2 wherein R³ is phenylthio; Y and R⁴ are bothhydrogen.
 6. The compound of claim 2 wherein R³ is phenylthio; Y isacetoxy; and R⁴ is hydrogen.
 7. The compound of claim 1 wherein R³ isphenylthio; Y is acetoxy or hydrogen; and R is ##STR11##
 8. The compoundof claim 7 wherein Y and R⁴ are both hydrogen.
 9. The compound of claim7 wherein Y is acetoxy and R⁴ is hydrogen.